No word yet discussed on the forum. There's the debatable golf tee mod with some reported problems caused by it. For a 4 banger most people actually are surprised it sounds as good as it does. Best sound upgrade to the 28i is the 35i.

I think there are a few setups available for the 28i - Remus, Supersprint and AC Schnitzer.

I'm personally still waiting to try a 135i exhaust on my 35i......all the ones that are readily available to me are about 350km's away If all else fails, I should be able to snag one middle of next month when a local guy gets back from assignment.

Just so everyone knows I called my dealer and asked about a 1 series exhaust on the X1s and they said it won't match. They do expect X1 specific upgrades to come out in March or April.

Dealers lie all the time. They told me it's impossible to retrofit paddleshifters when there are at least three companies that offer the option. What they really meant to say is, "No, we won't put parts officially designed for another series on your car because BMW NA will yell at us."

Im not saying it will work, merely pointing out that you shouldn't trust your dealer.

I took a bunch of under-car exhaust pictures and they look identical. The mounting points are 100% the same but the only question is if the pipe will thread through one of the rear chassis braces. Have an email out to a BMW parts guy now and we will see, but I'm 99% sure it will fit - perhaps with the minor modifications.

I took a bunch of under-car exhaust pictures and they look identical. The mounting points are 100% the same but the only question is if the pipe will thread through one of the rear chassis braces. Have an email out to a BMW parts guy now and we will see, but I'm 99% sure it will fit - perhaps with the minor modifications.

One more thing to point out - the xdrive 35i's have 2 midpipe catalytic converters. Removing those will take 20min at a shop, cost $30-50), and will increase sound and give you a 10-12whp gain, while NOT triggering a CEL. Plus it is totally reversible - just weld them in for another $30-50 if you ever want to go back to stock.

This is exactly what all the 335 xdrive guys did - the xdrive has the midcats (as do all n54 engines) and a popular mod is removing them (or replacing them with a N55 midpipe without midcats from a 135i, in the case of the n54.)

Also, the other thing I realized is that the BMW PE piping is the same size as the oem piping. Even if the entire BMW PE piping doesn't fit, there's no reason we can't get 100% of the effect of the PE by deleting the resonator, chopping the BMW PE muffler off from the piping, and welding back on to the stock piping.

The bottom line is that this CAN be done for probably $150 worst case installation at a decent shop. Doing the entire mod including secondary cat deletes should be good for around 15whp least based on other xdrive dyno charts (in addition to drivetrain losses, this is one of the reasons xdrive cars always dyno lower stock).

I personally don't like quad tipped 3 and 5 series because they always look like wanabee Ms.

funnily enough, my dad has a magnetic badges so he can take of the M5 badge when he wants to but sometimes he puts a 528i badge on, it suprises people at the stop light quit nicely, the look on peoples faces when they try to race him in his '528i' and hear the roar...

Thanks for taking the time to take the pics. It really does look similar I must say.
If the local guy with a spare 135i axle back is in town this weekend I may grab it from him for a test fit as I'll have the car on Jack stands anyway while fitting the coilovers.

It would be nice to get hold of a PE, or indeed a number of other aftermarket units to see if they fit up to the X1 with the extra bracing under there.

I thought this thread was looking for performance exhaust options for the the 28i? Start a separate thread for the 35i please, because every time this one is bumped I think there's some great new exhaust option for the 28i (stateside).